667162251 has 60 divisors (see below), whose sum is σ = 1168331472. Its totient is φ = 371532096.

The previous prime is 667162213. The next prime is 667162259. The reversal of 667162251 is 152261766.

It is a happy number.

It is not a de Polignac number, because 667162251 - 2⁷ = 667162123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667162259) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4477525 + ... + 4477673.

Almost surely, 2^667162251 is an apocalyptic number.

667162251 is a deficient number, since it is larger than the sum of its proper divisors (501169221).

667162251 is an equidigital number, since it uses as much as digits as its factorization.

667162251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 212 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 667162251 is about 25829.4841411903. The cubic root of 667162251 is about 873.7968775159.

The spelling of 667162251 in words is "six hundred sixty-seven million, one hundred sixty-two thousand, two hundred fifty-one".